Subsequent Event (Details) (USD $)	3 Months Ended
	Mar. 31, 2013
Subsequent Event [Line Items]
Sales of Real Estate	$ 6,350,000
Gain (Loss) on Sale of Property Plant Equipment	3,500,000
Payments to Acquire Property, Plant, and Equipment	3,300,000
Payments for (Proceeds from) Other Investing Activities	$ 2,500,000